1918 - Naval Aviators of Marine Day Squadron 9 make first raid-in-force for the Northern Bombing Group in World War I when they bombed German railroad at Thielt Rivy, Belgium.
1917 - USS Cassin (DD-43) torpedoed by German submarine U-61 off coast of Ireland. In trying to save the ship, Gunner's Mate Osmond Kelly Ingram becomes first American sailor killed in World War I and later is awarded the Medal of Honor for his heroism. He becomes the first enlisted man to have a ship named for him, in 1919.
1948 - First women officers on active duty sworn in as commissioned officers in regular Navy under Women's Service Integration Act of June 1948 by Secretary of the Navy John L. Sullivan: CAPT Joy B. Hancock, USN; LCDR Winifred R. Quick, USN; LCDR Anne King, USN; LCDR Frances L. Willoughby, MC, USN; LT Ellen Ford, SC, USN; LT Doris Cranmore, MSC, USN; LTJG Doris A. Defenderfer, USN; and LTJG Betty Rae Tennant, USN.
1957 - USS Lake Champlain reaches Valencia, Spain to assist in flood rescue work.
1960 - USS Patrick Henry (SSBN-599) begins successful firing of four Polaris test vehicles under operational rather than test conditions. Tests are completed on 18 October.
1965 - U.S. Naval Support Activity Danang Vietnam, established.
1885 - CAPT Alfred Thayer Mahan, USN, becomes Superintendent of the Naval War College
1891 - Baltimore Incident, Valparaiso, Chile.
1940 - 5th group of 10 destroyers from the Destroyers for Bases Deal turned over to British at Halifax, Canada.
1942 - Carrier aircraft from USS Hornet (CV-8) conduct attacks on Japanese troops on Guadalcanal.
1943 - Navy accepts its first helicopter, a Sikorsky YR-4B (HNS-1) at Bridgeport, Connecticut.